package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Setmeal;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private SetmealMapper setmealMapper;
    /*
     将菜品相关信息 存到 dish 和 dish_flavor表中
     */
    @Override
    @Transactional//添加操作 要么同时成功 要么同时失败
    public void saveWithFlavor(DishDTO dishDTO) {
        log.info("存到到dish表和口味表中");
        //创建一个dish对象
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
                        // copy 对应的属性！！
        //添加到dish表
        dishMapper.insert(dish);// ！！！！主键回显！！！

        // 上面新增的菜品  和下面 要添加的口味  是对应的！！
        // 下面需要菜品id 是上面插入后的id
        Long dishId = dish.getId();//添加后的菜品id

        //添加口味表
        //flavor是口味信息
        List<DishFlavor> flavors = dishDTO.getFlavors();
        // 在添加口味表数据之前 将菜品id设置进去
        if(flavors!=null && flavors.size()>0){//健壮性判断  容器里面有没有东西  有东西才遍历
            for (DishFlavor flavor : flavors) {
                flavor.setDishId(dishId);
            }
        }
        dishFlavorMapper.insertBatch(flavors);//批量插入

    }

    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        // 1:启动分页
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        //2:执行响应的基础mapper方法
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);//传入条件
        //3:封装 PageResult对象
        PageResult pageResult = new PageResult(page.getTotal(),page.getResult());
        return pageResult;
    }

    @Override
    public DishVO getByIdWithFlavor(Long id) {
//        DishVO  组成 dish 基本信息 + 相关的口味信息
        //  List<DishFlavor> flavors
        //1:查询菜品基本信息
        Dish dish = dishMapper.getById(id);
        //2:查询菜品相关口味信息
        List<DishFlavor> flavors = dishFlavorMapper.getByDishId(id);

        //将两个信息 封装到DishVO上
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        //设置口味信息
        dishVO.setFlavors(flavors);

        return dishVO;
    }

    @Override
    public void update(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        // 先更新菜品基本信息
        dishMapper.update(dish);
        //删除原来口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        //重新插入口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors!=null && flavors.size()>0){
            for (DishFlavor flavor : flavors) {
                flavor.setDishId(dishDTO.getId());
            }
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    @Override
    public void deleteBatch(List<Long> ids) {
        // 判断当前菜品是否能够删除：是否存在起售中的菜品
        for (Long id : ids) {
            // 根据id查询对应的菜品
            Dish dish = dishMapper.getById(id);
            // 获取菜品的售卖状态
            if (dish.getStatus() == StatusConstant.ENABLE) {
                // 当前菜品为起售状态，不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }

        // 判断当前菜品是否能够删除：是否被套餐关联了
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if (setmealIds == null && setmealIds.size() > 0) {
            // 当前菜品关联了套餐不能进行删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        // 删除菜品表中的菜品数据  以及菜品表中的口味数据
        for (Long id : ids) {
            // 根据id删除菜品表中的数据
            dishMapper.deleteById(id);
            // 删除原有的口味数据
            dishFlavorMapper.deleteByDishId(id);
        }
    }


    /**
     * 菜品起售停售
     *
     * @param status
     * @param id
     */
    @Transactional
    public void startOrStop(Integer status, Long id) {
        Dish dish = Dish.builder()
                .id(id)
                .status(status)
                .build();
        dishMapper.update(dish);

        if (status == StatusConstant.DISABLE) {
            // 如果是停售操作，还需要将包含当前菜品的套餐也停售
            List<Long> dishIds = new ArrayList<>();
            dishIds.add(id);
            // select setmeal_id from setmeal_dish where dish_id in (?,?,?)
            List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(dishIds);
            if (setmealIds != null && setmealIds.size() > 0) {
                for (Long setmealId : setmealIds) {
                    Setmeal setmeal = Setmeal.builder()
                            .id(setmealId)
                            .status(StatusConstant.DISABLE)
                            .build();
                    setmealMapper.update(setmeal);
                }
            }
        }
    }


    /**
     * 根据分类id查询菜品
     * @param dish
     * @return
     */
    public List<Dish> list(Dish dish) {
        dish.setStatus(StatusConstant.ENABLE);
        return dishMapper.list(dish);
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
